On 4/12/2014 11:08 AM, Augie Fackler wrote: > > On Mar 29, 2014, at 2:53 PM, Gregory P. Smith <greg at krypto.org > <mailto:greg at krypto.org>> wrote: > >> >> On Thu, Mar 27, 2014 at 3:05 PM, Antoine Pitrou <solipsis at pitrou.net >> <mailto:solipsis at pitrou.net>> wrote: >> >> On Thu, 27 Mar 2014 18:47:59 +0000 >> Brett Cannon <bcannon at gmail.com <mailto:bcannon at gmail.com>> wrote: >> > On Thu Mar 27 2014 at 2:42:40 PM, Guido van Rossum >> <guido at python.org <mailto:guido at python.org>> wrote: >> > >> > > Much better, but I'm still not happy with including %s at all. >> Otherwise >> > > it's accept-worthy. (How's that for pressure. :-) >> > > >> > >> > But if we only add %b and leave out %s then how is this going to >> lead to >> > Python 2/3 compatible code since %b is not in Python 2? Or am I >> > misunderstanding you? >> >> I think we have reached a point where adding porting-related >> facilities >> in 3.5 may actually slow down the pace of porting, rather than >> accelerate it (because people will then wait for 3.5 to start porting >> stuff). >> >> >> I understand that sentiment but that is an unjustified fear. It is not >> a good reason not to do it. Projects are already trying to port stuff >> today and running into roadblocks when it comes to ascii-compatible >> bytes formatting for real world data formats in code needing to be 2.x >> compatible. I'm pulling out my practicality beats purity card here. >> >> Mercurial is one of the large Python 2.4-2.7 code bases that needs >> this feature in order to support Python 3 in a sane manner. (+Augie >> Fackler to look at the latest >> http://legacy.python.org/dev/peps/pep-0461/ to confirm usefulness) > > That looks sufficient to me - the biggest thing is being able to do > > "abort: %s is broken" % some_filename_that_is_bytes > > and have that work sanely, as well as the numerics. This looks like > exactly what we need, but I'd love to test it soon (I'm happy to build a > 3.5 from tip for testing) so that if it's not Right[0] changes can be > made before it's permanent. Feel encouraged to CC me on patches or > something for testing (or mail me directly when it lands). Add yourself as nosy to http://bugs.python.org/issue20284 "patch to implement PEP 461 (%-interpolation for bytes)" Indeed, you could help test it the latest version, and others as posted. -- Terry Jan Reedy
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